Improvement in harvester cutter-bars



LT. MGGORMIGK. Harvester Gutter-Bar.

No. 20s-,175. Ptented April 30,1878.

yf W @m N. PETERS, PHOTO-LITHQGRAPHER, WASlmmToN4 u, G.

UNITED STATES PATENTOFFIGE.

JAMES MCGORMIOK, OF PRINCETON, INDIANA.v

IMPROVEM ENT'IN HARVESTER CUTTER-BARS.

Specification forming part of Letters Patent No. 203,175, dated April30, 1878 application led 2 March 12, 1878. Y

To all whom t may concern:

Beit known that I, J Ali/res MoGoRMroK, of Princeton, in the county ofGibson, and in the State of Indiana, have invented certain new anduseful Improvements in Harvester- Cutters; and do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying. drawings, and to the letters of referencemarked thereon, making a part of this specication.

My invention relates to sectional knives for reapers and mowers 5 and itconsists in the construction and arrangement of the cutterbar, sectionalcutters, and the devices for connecting the same, as will be hereinaftermore fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure l is a plan view of my improved cutter-bar. Fig. 2 is alongitudinal section of the same on the line x w, Fig. 1. Fig. 3 is atransverse section on the line y y, Fig. 1. Fig. 4 is a perspective viewof one of the connecting devices.

Arepresents the cutter-bar, provided at one end with the eye B forattachment to the pitman. C G are the knife-sections.

Each knife is formed on each side, at the base, with a square notch orslot, a, and they are connected to the knife-barA in the followingmanner: The bar A` is made of the 4square form shown in Fig. 3, and uponthe eX- treme end is formed a bolt, b.

D represents a metal sleeve of such lform and size as to iit on the barA,it being moved lengthwise from the end inward. This sleeve is open atthe top at each end, leaving a top plate, D1, onlyinthe center. The endsof this top plate are beveled under, as shown in Fig. 4 at x w. Theinner edges of the notches a in the knife-sections are beveled tocorrespond therewith.

The sleeves D are to form the connections between the knife sections andthe knifebar; but at each end of the cutter a sleeve of just half thesize is put on-that is to say, one sleeve is divided in the center toform the end sleeves, as shown at D2 in Fig. 2. A

One half-sleeve, D2, is first put on the knife- Abar A up to theshoulder formed by the eye B, and then a sleeve, D; but before thissleeve l edges x :v of said top plates, fitting over the beveled edgesin said notches, will hold said section in place. Another sleeve andanother knife-section are then put on, and so on to the entire length ofthe bar, when, at the outer en d, the second half-sleeve D2 is put on tocomplete the cutter-bar. A nut, d, and jamnut d are then screwed on theend bolt b, holding all the parts rmly together.

It will readily be seen that it is only necessary to loosen the nuts dd', when the sleeves can be sufficiently separated to remove any one ormore or all of the knifesections, for sharpening or other purposes. theknifesections being in the center of the slides, and the joints of theslides being in the center of the sections, the whole bar becomesmaterially strengthened.

It will be noticed th at from the construction of the sections, shouldthe knife receive a shock, the strain will be thrown ou the shoulder ofthe knife-sections, thus bearing the sleeve against the sides of thebar, and not toward the end; hence no strain comes on the nuts, and allthe office required of these nuts is simply to tighten and loosen andhold in place.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. A cutter bar consisting of a straight bar, a series of removablesleeves having central top plates with beveled edges, and a series ofremovable knifesections having notches to correspond with the topplates, and arranged to break joints, substantially as herein set forth.

2. The combination of the knife-bar-A, with..

February, 1878.

JAMES MGGORMIOK. Witnesses CALVIN R. Hown, R. M. J. MILLER.

The joints of

